Suzuki 2 Strokes

I went thru all that, replaced the valves, cleaned them, checked for leaks, still got air. I knew there had to be a leak somewhere I just couldn't find it. I finally took some liquid electrical tape and painted the 1 into 2 joint and have had no leaks since. At least on mine, and probably most others I don't think the valves have anything to do with it. I think there is a very tiny crack or hole some where in the joint allowing air to get in. I think any type of sealer, paint or whatever around the joints going into and coming out of are going to solve your problem. And, it will cost you nothing to find out.

Good tip !

Thanks for the tip. Flushed the lines with denatured alcohol, put them back on and, so far so good. If it happens again I'll be sure and try your idea. Sounds like a great idea. Thanks again.